Convert oven gas marks (1–9) to Fahrenheit and Celsius with a full baking temperature reference table.. Oven Gas Mark Converter is a free online tool from the ToolsRift Special Unit Converters collection. It runs entirely in your browser — nothing to install, no signup, and your data never leaves your device.
Select a gas mark to see its Fahrenheit and Celsius temperatures, plus a full reference table of every mark from 1 to 9.
°F = 25 × gas mark + 250, then °C = (°F − 32) × 5⁄9 for the Celsius value.
Gas Mark 4 = 350 °F = about 177 °C, the standard 'moderate' oven setting.
Gas marks run 1 (cool, 275 °F) to 9 (very hot, 475 °F) in 25 °F steps.